Inishfree Irish Dancer member, Ashleigh Hopkins, whirls around in a solo performance during the St. Patrick's Day festivities in 2012.

Inishfree Irish Dancer member, Ashleigh Hopkins, whirls around in a solo performance during the St. Patrick's Day festivities in 2012.

Photo: TOM REEL, San Antonio Express-News

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Waters of the San Antonio River turn green before the start of St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Waters of the San Antonio River turn green before the start of St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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The Inishfree Irish Dancers romp on stage during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

The Inishfree Irish Dancers romp on stage during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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San Antonio River water churns up green as the St. Patrick's Day festivities get underway at Arneson River Theatre on March 16, 2012.

San Antonio River water churns up green as the St. Patrick's Day festivities get underway at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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The Inishfree Irish Dancers perform during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

The Inishfree Irish Dancers perform during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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METRO Colorful costumes fill the stage as the Inishfree Irish Dancers take the stage during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012 Tom Reel/ San Antonio Express-News

METRO Colorful costumes fill the stage as the Inishfree Irish Dancers take the stage during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012 Tom Reel/ San Antonio Express-News

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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Spectators dress for the occasion during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Spectators dress for the occasion during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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The Inishfree Irish Dancers perform during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

The Inishfree Irish Dancers perform during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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Gary Pommrehn (left) and Mike Aldinger, from Iowa, figure out their cameras before performances during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Gary Pommrehn (left) and Mike Aldinger, from Iowa, figure out their cameras before performances during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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Five year olds take the stage as the Inishfree Irish Dancers perform during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Five year olds take the stage as the Inishfree Irish Dancers perform during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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Fiona and Kevin Pemberton, from Dallas, wear proper attire as they enjoy performers during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Fiona and Kevin Pemberton, from Dallas, wear proper attire as they enjoy performers during the St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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Colorful costumes fill the stage as the Inishfree Irish Dancers take the stage during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Colorful costumes fill the stage as the Inishfree Irish Dancers take the stage during St. Patrick's Day festivities at Arneson River Theatre on March 16, 2012.

Photo: TOM REEL, Tom Reel / Treel@express-news.net

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St. Patrick's Day on the River Walk

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Consider it Fiesta's opening act. St. Patrick's Day festivities happen all weekend along the River Walk, culminating Sunday when the San Antonio River is dyed green and rechristened the River Shannon during the River Parade. Then there's the two-day Irish Festival, a St. Paddy's Day River Run and an arts and crafts show.